空间目标红外辐射特性求解的关键是目标表面温度场的确定。以卫星作为研究对象，首先建立了目标表面的热网络平衡方程，然后利用热分析软件Thermal Desktop建立了热分析数值模型，最后调用Sinda/Fluint求解出目标表面温度分布。仿真结果表明，该算法和传统方法相比具有速度快、精度高等优点，为复杂空间目标的红外辐射特性计算提供了有力的技术支撑。

Establishing the surface temperature filed is the key factor of the space target IR radiation characteristics. The satellite’s surface heat balance equation was built firstly, and the Thermal Desktop software, which is based on finite difference thermal analysis method, was used to establish the thermal analytical numerical model. At last, the Sinda/Fluint software was called to calculate the temperature distribution of the target surface. The simulation results showed that this algorithm has many merits of high calculation speed and high precision compared to the traditional methods and provides strong technique support to complex space target infrared calculation, which is valuable in engineering application.